# Physics 105

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1. velocity
• distance travelled divided by time of travel
2. Fundamental SI units
• Length      Mass             Time
• meter (m) kilogram (kg) second (s)

Electric Current: ampere (A)
3. Electric Charge
measured in coulombs, C

1C = 1 A⋅s
4. Kinetic Energy (KE)
energy of motion
5. Potential Energy (PE)
stored energy that can be converted to kinetic energy

ΔPEgrav=ΔKE
6. charge
q or Q
7. Electric Potential

or

Potential

• measured in volts, V
• 1V = 1 J/C
8. Potential Difference
Voltage

difference in potential between 2 points

9. Current   (I)
flow of charge

measured in ampere, A

1A = 1 C/s
10. Circuit
closed loop that current can flow around
11. Ohm's Law
current is proprtional to voltage

V = IR

V=Voltage, I=current, R=resistance
12. Resistance   (R)
Measured in ohm, Ω

1Ω = 1 V/A

smaller the resistance, more easily current flows
13. Resistivity (R)

measured in Ω⋅m

changes with temperature
• p(T) = resistivity at temperature T
• p0 = resistivity at some reference temperature, T0 (usually 20 °C)
• α is the temperature coefficient of resistivity, usually has units of (°C)-1
14. Power
the rate at which energy is transferred

1W = 1 J/s
15. Power (P)
P = IV

P = I2R
 Author: ufvlu ID: 313996 Card Set: Physics 105 Updated: 2016-01-18 21:14:44 Tags: chapter electrical charge potential energy Folders: physics Description: 1.2: Physical Quantities and Units 1.3: Accuracy, Precision and Sig Figs 18.1: Electric Charge 19.1: Electric Potential Energy: Potential Difference Show Answers: